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Renesas ISL88003IH31Z-T
- Part No.:
- ISL88003IH31Z-T
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ISL88003IH31Z-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,848
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Product details
Overview
ISL88003IH31Z-T from Renesas is an ultra-low-power 3-pin voltage supervisor IC with push-pull active-high reset output, 3.07V fixed threshold, ±1.2% accuracy, and 190ms power-on reset timeout-designed for reliable supply monitoring in microcontroller-based portable equipment.
For engineers reviewing the ISL88003IH31Z-T datasheet, ISL88003IH31Z-T pinout, ISL88003IH31Z-T application, or ISL88003IH31Z-T equivalent, this page delivers verified specifications, package mapping, functional context, and real-world selection guidance for low-voltage brownout protection in battery-powered systems.
Technical Context
The ISL88003IH31Z-T integrates a precision bandgap reference, comparator with hysteresis, and POR circuitry to assert reset when VDD falls below 3.07V (±1.2%) or rises from <1V. Its internal architecture ensures immunity to supply transients without external components.
It operates across –40°C to +85°C with 160nA typical supply current at 1.8V, and guarantees valid reset signaling down to VDD = 1V-enabling robust startup and brownout recovery in energy-constrained embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.07V ±1.2% - precisely monitors 3.0V–3.3V rails without calibration |
| Supply Current | 160nA typical - enables multi-year operation on coin-cell batteries |
| POR Timeout | 190ms - ensures stable MCU initialization before release |
| Operating Voltage Range | 1.8V to 5.5V - supports wide input range while supervising 3.07V rail |
| Reset Output Type | Push-pull active-high - drives high without external pull-up; sinks 10mA max |
| Valid Reset Down To | VDD = 1V - maintains supervision during deep brownout conditions |
| Temperature Range | –40°C to +85°C - qualified for industrial and portable equipment environments |
Pinout & Package
ISL88003IH31Z-T is housed in a Pb-free 3-lead SOT-23 package (JEDEC TO-236), measuring 2.92mm × 1.30mm × 1.00mm, with gull-wing leads and matte tin (e3) termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | IC substrate and comparator reference node; must be connected to system ground plane |
| 2 (RST) | Active-high push-pull reset output | Drives HIGH (≈VDD) when VDD ≥ 3.07V; LOW (≈0.2V) when VDD < 3.07V or during POR |
| 3 (VDD) | Power supply and monitored input | Supplies IC and serves as analog input to internal voltage comparator; no external sense resistor needed |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.07V threshold | Eliminates need for external resistive divider; reduces BOM count and layout area |
| 160nA supply current | Extends battery life in always-on IoT sensors and wearables beyond 10 years |
| 190ms POR timeout | Guarantees sufficient time for crystal oscillator stabilization and register loading in MCUs |
| Reset valid down to 1V | Prevents spurious wake-up during deep discharge or cold-start scenarios |
| No external components | Reduces design risk and board space; simplifies qualification for medical and automotive applications |
Applications
| Microprocessor Power-Up Control | Portable Medical Sensor Monitoring |
|---|---|
Use Scenario: Ensures safe boot sequence for ARM Cortex-M0+ microcontrollers in handheld diagnostic devices. IC Role / Device Role / Timing Role: Voltage supervisor providing active-high reset signal synchronized to 3.0V rail stabilization. Use Value: Prevents firmware execution before VDD reaches 3.07V and remains stable for 190ms-eliminating corrupted memory writes. | Use Scenario: Monitors lithium coin-cell supply in Bluetooth-enabled glucose meters operating at ambient temperatures. IC Role / Device Role / Timing Role: Low-current supervisor maintaining reset assertion until battery recovers from pulse load sag. Use Value: 160nA quiescent current extends single-CR2032 battery life to >5 years; 1V minimum operation prevents false resets during cold storage. |
| Industrial PLC I/O Module Supervision | Smart Home Battery Backup System |
Use Scenario: Secures reliable restart of isolated RS-485 communication modules after AC power interruption. IC Role / Device Role / Timing Role: Supervisor for 3.3V LDO output powering UART transceivers and optocouplers. Use Value: ±1.2% threshold accuracy ensures consistent trip point across temperature; push-pull RST avoids pull-up resistor tolerance drift. | Use Scenario: Manages fail-safe shutdown and graceful reboot in Zigbee-connected smoke detectors with backup supercapacitors. IC Role / Device Role / Timing Role: Brownout detector triggering controlled MCU sleep entry when main supply drops below 3.07V. Use Value: Immunity to power-supply transients prevents nuisance resets during capacitor charging spikes; 3-lead SOT-23 fits tight PCB footprints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2-T | 3.08V threshold, ±2.5% accuracy, 140ms POR, open-drain RST | Requires external pull-up; less accurate over temperature | Choose if legacy MAX809 footprint compatibility is required and ±2.5% tolerance is acceptable |
| TPS3808G30DBVR | 3.0V threshold, ±0.5% accuracy, 200ms POR, adjustable delay, 600nA IQ | Higher quiescent current; requires external capacitor for delay tuning | Choose for tighter threshold tolerance and programmable timeout where board space allows |
Compared with MAX809TRD2-T and TPS3808G30DBVR, the ISL88003IH31Z-T delivers superior accuracy (±1.2% vs ±2.5% or ±0.5%), lowest power (160nA vs 600nA), and push-pull simplicity-making it optimal for space- and energy-constrained designs where fixed 3.07V supervision is required.
Availability
ISL88003IH31Z-T is available at Aetrix Electronics and suitable for microcontroller power-up control, portable medical sensor monitoring, and industrial PLC I/O module supervision requiring stable component supply and long-term lifecycle support.
Supply support for ISL88003IH31Z-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT markets.
The ISL88003IH31Z-T belongs to Renesas' Ultra Low Power Voltage Supervisor family, engineered specifically for battery-powered and energy-harvesting systems demanding sub-200nA operation and high threshold stability.
FAQ
What is the exact reset threshold voltage of the ISL88003IH31Z-T?
The ISL88003IH31Z-T has a nominal reset threshold of 3.07V, with guaranteed accuracy of ±1.2% over –40°C to +85°C. At +25°C, the typical trip point is 3.075V, ranging from 3.038V (min) to 3.112V (max). This value is factory-trimmed and does not require external calibration.
Does the ISL88003IH31Z-T require external components to operate?
No, the ISL88003IH31Z-T requires no external components. It integrates all necessary reference, comparator, and timing circuitry internally. The device operates with only three connections: VDD, GND, and RST-making it ideal for space-constrained PCB layouts and reducing bill-of-materials complexity.
What is the function of the RST pin on the ISL88003IH31Z-T?
The RST pin on the ISL88003IH31Z-T is a push-pull active-high output. It drives HIGH (≈VDD) when VDD ≥ 3.07V and remains stable for the 190ms POR timeout; it drives LOW (≈0.2V) when VDD falls below the threshold or during initial power-up. This eliminates the need for an external pull-up resistor.
Can the ISL88003IH31Z-T operate with supply voltages below 3.07V?
Yes-the ISL88003IH31Z-T guarantees valid reset signaling down to VDD = 1V. While its threshold is 3.07V, the internal circuitry remains functional and asserts reset correctly even as VDD drops from 3.07V to 1V, enabling reliable brownout detection in deeply discharged battery scenarios.
Is the ISL88003IH31Z-T pin-compatible with other members of the ISL8800x family?
Yes-the ISL88003IH31Z-T shares identical 3-lead SOT-23 pinout and footprint with all ISL88001/88002/88003 variants in the same package (e.g., ISL88001IH31Z-T, ISL88002IH31Z-T). Only the reset logic (push-pull vs open-drain) and threshold differ; no PCB redesign is needed when substituting within the same package type.
ISL88003IH31Z-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.075V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ISL88003IH31Z-T FAQ
1.How can I place an order for ISL88003IH31Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL88003IH31Z-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL88003IH31Z-T reliable?
The price and inventory of ISL88003IH31Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL88003IH31Z-T is usually 5 days.
3.What payment methods are accepted for ISL88003IH31Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL88003IH31Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL88003IH31Z-T?
ISL88003IH31Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL88003IH31Z-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL88003IH31Z-T?
For technical support, including ISL88003IH31Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL88003IH31Z-T requirements.
6.How does Aetrix verify that ISL88003IH31Z-T is sourced from the original manufacturer or authorized distributors?
All ISL88003IH31Z-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL88003IH31Z-T meets industry standards.
7.What is the process for return or replacement of ISL88003IH31Z-T?
All ISL88003IH31Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL88003IH31Z-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL88003IH31Z-T part is unused and in its original packaging.
Return procedure for ISL88003IH31Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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